Overview
The TPIC1021A-Q1 is a Local Interconnect Network (LIN) physical layer transceiver designed by Texas Instruments. This device integrates a serial transceiver with wake-up and protection features, making it suitable for low-speed in-vehicle networks. The LIN bus operates at data rates between 2.4 kbps and 20 kbps and is compliant with the LIN Physical Layer Specification Revision 2.0 and SAEJ2602 recommended practice for LIN. The TPIC1021A-Q1 is designed to operate in harsh automotive environments, handling LIN bus voltage swings from -40 V to 40 V and featuring various protection mechanisms such as undervoltage, overtemperature, and loss-of-ground protection.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VSUP) | 7 | - | 27 | V |
| Operating Temperature (TA) | -40 | - | 125 | °C |
| Thermal Shutdown Junction Temperature | - | - | 190 | °C |
| Low-Level Input Voltage (VIL) | -0.3 | - | VSUP - 3.3 | V |
| High-Level Input Voltage (VIH) | VSUP - 1 | - | VSUP + 0.3 | V |
| Leakage Current (IIKG) | -5 | 0 | 5 | μA |
| Package Type | - | - | SOIC (8) | - |
| Body Size (Nominal) | - | - | 4.90 mm × 3.91 mm | - |
Key Features
- LIN physical layer specification revision 2.0 compliant and conforms to SAEJ2602 recommended practice for LIN.
- Ground disconnection fail-safe at system level and ground shift operation at system level.
- Unpowered node does not disturb the network.
- Supports ISO9141 (K-Line)-like functions.
- Internal 30-kΩ pullup resistor with a series diode for responder applications; external 1-kΩ pullup resistor and series diode required for commander applications.
- Wake-up capabilities through LIN bus, NWake pin, or EN pin.
- Low quiescent current in sleep mode with active wake-up circuits.
- Protection features include undervoltage, overtemperature, and loss-of-ground protection.
- Open-drain RXD output compatible with 3.3-V and 5-V I/O microcontrollers.
Applications
- In-vehicle networking for low-speed data communication.
- Automotive systems requiring LIN bus communication.
- Commander and responder node applications in vehicle networks.
Q & A
- What is the TPIC1021A-Q1 used for? The TPIC1021A-Q1 is used as a LIN physical layer transceiver in in-vehicle networks.
- What are the compliant standards for the TPIC1021A-Q1? It is compliant with LIN Physical Layer Specification Revision 2.0 and SAEJ2602 recommended practice for LIN.
- What is the operating voltage range of the TPIC1021A-Q1? The operating voltage range is from 7 V to 27 V.
- How does the TPIC1021A-Q1 handle wake-up events? It can wake up through remote LIN bus transitions, local NWake pin, or EN pin.
- What protection features does the TPIC1021A-Q1 have? It includes undervoltage, overtemperature, and loss-of-ground protection.
- What is the purpose of the internal pullup resistor in the TPIC1021A-Q1? The internal 30-kΩ pullup resistor with a series diode is used for responder applications to pull the LIN bus high in the recessive state.
- Can the TPIC1021A-Q1 be used with different microcontroller voltages? Yes, the open-drain RXD output is compatible with both 3.3-V and 5-V I/O microcontrollers.
- How does the TPIC1021A-Q1 handle thermal shutdown? During a thermal shutdown, the driver is disabled to protect the device.
- What are the typical applications of the TPIC1021A-Q1? It is typically used in in-vehicle networking for low-speed data communication, including commander and responder node applications.
- What is the package type and body size of the TPIC1021A-Q1? The package type is SOIC (8) with a body size of 4.90 mm × 3.91 mm.
